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D( x )
4*x-3-1 = 0
4*x-3-1 = 0
4*x-3-1 = 0
4*x-4 = 0 // + 4
4*x = 4 // : 4
x = 4/4
x = 1
x in (-oo:1) U (1:+oo)
(3*(4*x-3))/(4*x-3-1) = 0
(3*(4*x-3))/(4*x-4) = 0
( 3 )
3 = 0
x belongs to the empty set
( 4*x-3 )
4*x-3 = 0 // + 3
4*x = 3 // : 4
x = 3/4
x = 3/4
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